1、环境描述 服务器B(从) 192.85.1.176
（系统安装及数据环境搭建，省略）
2. 创建同步用户：
在服务B命令行执行 ：
grant replication slave on *.* to 'replication'@'%' identified by 'mysqlsync'; flush privileges; grant FILE,SELECT, replication slave on *.* to 'replication'@'192.85.1.175' identified by 'mysqlsync'; flush privileges; 在服务器A命令行执行：grant replication slave on *.* to 'replication'@'%' identified by 'mysqlsync'; flush privileges; grant FILE,SELECT, replication slave on *.* to 'replication'@'192.85.1.176' identified by 'mysqlsync'; flush privileges;
在A与B服务器上检查主备复制账号是否正常：（1）分别在A与B服务器上的MYSQL命令行执行 [ show grants for 'replication'@'%';]
如果输出结果类似于如下，表示正常，其他均为异常
mysql> show grants for 'replication'@'%'; +--------------------------------------------------------------------------------------------------------------------------------------+ | Grants for replication@% | +--------------------------------------------------------------------------------------------------------------------------------------+ | GRANT SELECT, FILE, REPLICATION SLAVE ON *.* TO 'replication'@'%' IDENTIFIED BY PASSWORD '*47E2485DF0DBED84B9BD90AF25F48A36E7EAD57E' | +--------------------------------------------------------------------------------------------------------------------------------------+ 1 row in set (0.00 sec)（2）使用主备复制账号在A服务器远程登录B ，在B服务器远程登录A ，测试 ，如果可以正常登录说明，账号正常，可以使用。
如果出现如下错误信息：
ERROR 2003 (HY000): Can't connect to MySQL server on '192.85.1.175' (111) sxzichen@ubutun:/var/log/mysql$ ERROR 2003 (HY000): Can't connect to MySQL server on '192.85.1.175' (111) ERROR 2003 (HY000): Can't connect to MySQL server on '192.85.1.175' (111) 或 ERROR 2003 (HY000): Can't connect to MySQL server on '192.85.1.176' (111) sxzichen@ubutun:/var/log/mysql$ ERROR 2003 (HY000): Can't connect to MySQL server on '192.85.1.176' (111) ERROR 2003 (HY000): Can't connect to MySQL server on '192.85.1.176' (111)导致原因是，MYSQL 数据库 不允许远程访问，需要分别修改A与B服务器 中数据库配置文件my.cnf ，注释掉 [ bind-address = 127.0.0.1 ] 即为 [#bind-address = 127.0.0.1]
分别重新启动MYSQL服务器 ，测试正常
3.配置数据主切换 之服务器A ，修改其对应的数据配置文件----my.cnf ,在 [MYSQLD}添加如下行
# mysql replication server-id = 1 log_bin = /var/log/mysql/mysql-bin.log master-host = 192.85.1.176 master-user = replication master-password = mysqlsync master-port = 3306 master-connect-retry = 60 binlog-do-db = hrkip_zhhwd binlog-ignore-db = mysql binlog-ignore-db = information_schema binlog-ignore-db = phpmyadmin replicate-do-db = hrkip_zhhwd replicate-ignore-db = mysql,information_schema配置信息简单介绍：
server-id = 1 #主机标示，整数 log_bin = /var/log/mysql/mysql-bin.log #确保此文件可写 binlog-do-db =hrkip_zhhwd #需要备份数据，多个写多行 binlog-ignore-db =mysql #不需要备份的数据库，多个写多行
master-user = replication #远程登录数据库用户名称 master-password = mysqlsync #远程登录数据库用户密码 master-port = 3306 #远程数据库服务器端口号，可以使用 show variables like 'port'; 命令查看，必要与目标数据库服务器端口号一致
4.配置数据主切换 之服务器B ，修改其对应的数据配置文件----my.cnf ,在 [MYSQLD}添加如下行
#mysql replication server-id = 2 log_bin = /var/log/mysql/mysql-bin.log master-host = 192.85.1.175 master-user = replication master-password = mysqlsync master-port = 3306 master-connect-retry = 60 binlog-do-db = hrkip_zhhwd binlog-ignore-db = mysql binlog-ignore-db = information_schema binlog-ignore-db = phpmyadmin replicate-do-db = hrkip_zhhwd replicate-ignore-db = mysql,information_schema5.检查配置是否正常（l两台服务器上分别检查）：
启动 slave 服务 ，在MYSQL命令行执行
mysql> slave start ; Query OK, 0 rows affected, 1 warning (0.00 sec) 查看slave 状态 ，执行命令： mysql> show slave status \G ; *************************** 1. row *************************** Slave_IO_State: Waiting for master to send event Master_Host: 192.85.1.175 Master_User: replication Master_Port: 3306 Connect_Retry: 60 Master_Log_File: mysql-bin.000002 Read_Master_Log_Pos: 106 Relay_Log_File: ubutun-relay-bin.000005 Relay_Log_Pos: 251 Relay_Master_Log_File: mysql-bin.000002 Slave_IO_Running: Yes Slave_SQL_Running: Yes Replicate_Do_DB: hrkip_zhhwd Replicate_Ignore_DB: mysql,information_schema Replicate_Do_Table: Replicate_Ignore_Table: Replicate_Wild_Do_Table: Replicate_Wild_Ignore_Table: Last_Errno: 0 Last_Error: Skip_Counter: 0 Exec_Master_Log_Pos: 106 Relay_Log_Space: 552 Until_Condition: None Until_Log_File: Until_Log_Pos: 0 Master_SSL_Allowed: No Master_SSL_CA_File: Master_SSL_CA_Path: Master_SSL_Cert: Master_SSL_Cipher: Master_SSL_Key: Seconds_Behind_Master: 0 Master_SSL_Verify_Server_Cert: No Last_IO_Errno: 0 Last_IO_Error: Last_SQL_Errno: 0 Last_SQL_Error: 1 row in set (0.00 sec) ERROR: No query specified 如果需要重新启动slave 服务器，首先 执行 slave stop ,再执行 reset slave , 删除 MYSQL 数据库对应的my.cnf 文件中log_bin目录（ /var/log/mysql/ ）下的" mysql-bin."开头的所有文件，之后再执行slave start 命令 。6.进行测试，主备是否正常工作，slave 启动时，两个服务器上都启动，启动后不要随意关闭再重启，例如在服务器A上启动后。
在服务器A数据中插入
INSERT INTO ddgl_qdlx ( qdlxmc, lxjc, qdlxbz) VALUES ('175a', '75a', '175a'); 在服务器B中可以看到对应的记录 。同样在服务器B中插入 ：
INSERT INTO ddgl_qdlx (qdlx_id, qdlxmc, lxjc, qdlxbz) VALUES ( '176b', '76b', '176b') ; 在服务器A中可以看到对应的记录 。测试OK 。
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